We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black Buna-N spider insert, L190 coupling size, 4 15/32 inch outside diameter

Lovejoy

Lovejoy TB Woods L190N Buna N Spider Insert 4 15/32 in

SKU CH-JJN0-D85Z2

Buna-N spider insert for L190 couplings rated to 5,000 RPM with 1,726 in-lb torque capacity and fail-safe design

  • Handles 1,726 in-lb torque for reliable power transfer
  • Runs up to 5,000 RPM for high-speed applications
  • Delivers 2.7 hp at 100 RPM for strong performance
  • Absorbs 0.015 in parallel misalignment to protect equipment
  • 80A durometer Buna-N resists wear and oil damage

TB Woods L190N Buna N Spider Insert

The TB Woods L190N Buna N Spider Insert is a replacement elastomer element for L190 jaw couplings. It transmits torque while accommodating angular and parallel shaft misalignment in industrial power-transmission systems. Maintenance teams and machine builders use it to restore or assemble couplings in pumps, conveyors and general machinery.

Thermals noise and power draw

The Buna-N spider operates at speeds up to 5,000 RPM and is rated for 2.7 hp at 100 RPM with a maximum torque capacity of 1,726 in-lb. As a non-lubricated polymer element it generates no measurable noise and adds negligible parasitic power loss during normal operation. The 80A durometer hardness provides consistent damping without excessive heat buildup.

Misalignment tolerance

This insert handles angular misalignment up to 1 degree and parallel offset up to 0.015 in. It fits hubs with a maximum bore of 2 1/8 in and features a fail-safe design that maintains drive engagement if the elastomer deteriorates. Buyers who need higher misalignment capacity or a different coupling size should select an alternative insert.

Highlights

  • Handles 1,726 in-lb torque for reliable power transfer
  • Runs up to 5,000 RPM for high-speed applications
  • Delivers 2.7 hp at 100 RPM for strong performance
  • Absorbs 0.015 in parallel misalignment to protect equipment
  • 80A durometer Buna-N resists wear and oil damage

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the Buna N spider insert into the L190 coupling hubs, and what step is often missed?

Align the insert between the two L190 hub jaws, ensuring the 4 15/32 in outside diameter seats fully. The step often missed is verifying the 0.015 in parallel misalignment limit after tightening the hubs on the shafts.

What maintenance or replacement will the Buna N spider insert need during its service life?

Inspect the 80A durometer Buna-N spider for cracking, swelling, or loss of elasticity caused by heat, oil, or ozone. Replace the insert when the 1 degree angular or 0.015 in parallel misalignment capacity can no longer be absorbed.

What limit appears first when the coupling runs continuously at high speed?

The 5,000 RPM maximum speed rating is the first limit reached under sustained use. Exceeding it risks overheating the Buna-N material and exceeding the 1,726 in-lb torque capacity at 100 RPM.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.